Kinda funny, but if you really want an audio test, Dredd is a solid one to try. Probably one of the best audio tracks out recently. Not a great movie, but entertaining action flick and basically worth the audio alone to me. I'm still waiting for a good price to pick it up though.
Other than the actual crash scene in Flight of the Phoenix, I really didn't care for the film. If you want some sub test material: WOTW, Incredibles, Cloverfield, Leon: The Professional